Mn 4 over TH 60
FairWatonwan County, Minnesota · At the JCT TH 4 · Structure no. 83023
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 352 ft
- 4 main spans
- Daily traffic
- 1,881
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Mn 4 over TH 60 is a prestressed concrete stringer/multi-beam or girder carrying Mn 4 over TH 60 in Watonwan County, Minnesota. It was built in 1977, so it is 48 years old, older than the Minnesota average of 38.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 1,881 vehicles a day, roughly 13% of them trucks, projected to reach 1,900 by 2042. The structure is 352 ft (107.2 m) long and 74 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mn 4 over TH 60 built?
It was built in 1977, making it 48 years old in 2025.
What condition is Mn 4 over TH 60 in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.
How much traffic does Mn 4 over TH 60 carry?
About 1,881 vehicles per day (2022 count), of which roughly 13% are trucks.
How long is Mn 4 over TH 60?
The structure is 352 ft (107.2 m) long with a longest span of 109 ft (33.1 m) and a deck 74 ft wide.
Who owns Mn 4 over TH 60?
It is owned by the State Highway Agency.